How to Prepare a Dataset for Meta-analysis in R - Demonstration

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In this video, Monika Wahi shows you how to prepare a dataframe in R for doing a systematic review of meta-analysis, so you can plot it in a Forrest plot using package rmeta. See her blog post here: dethwench.com/preparing-data-...
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How to Prepare a Dataset for Meta-analysis in R - Demonstration

[@icefunkdark8555]

This is so helpful! thank you so much!

[@bolasalak7360]

Good very simple illustration

[@pkmitrabotany]

Very nice 👍

[@ogbucharles4539]

Hi, I am struggling to run a metanalysis. It is my first time. I have continuous data with mean, sample size, and standard deviation for each study (without means for control and exposure groups.) Any ideas on the appropriate argument suitable for this type of data?

[@DethWench]

Hey there. It does not sound like you are doing a meta-analysis to me, but admittedly, I don't have all the details. Typically, the outcome graphed in a Forrest plot is a comparison: an odds ratio with discrete data, and a mean difference with continuous data. I'm not sure you are using an outcome. It sounds like you might just be using a mean that doesn't denote an outcome - maybe this is the issue?

[@ogbucharles4539]

@@DethWench I'm just means from different studies. I'm trying to calculate the weighted estimate using meta-analysis. My data is from energy use in different countries for water treatment. So i want to get a pooled estimate for all studies and also per country.

[@DethWench]

@@ogbucharles4539 I see. Perhaps this article will help you - it is about pooling continuous rate measures: bmcmedresmethodol.biomedcentral.com/articles/10.1186/1471-2288-4-17

[@ogbucharles4539]

@@DethWench Thanks. I will go through it. But at a glance i already see it's talking about comparing treatment and control groups. My data doesn't have treatment and control groups.

[@DethWench]

@@ogbucharles4539 I think maybe you are just trying to make a pooled mean, and a pooled confidence interval. If you want to do that, you need a pooled SD so you can make a pooled SE which will be part of the ME on the CI. You have to choose how to calculate one. I'm not sure how to do it from a whole bunch of groups (e.g., not just two). I'm bad at math. I guess what I'm saying is that I think you are not doing a meta-analysis because of this issue - I think you are just trying to make a pooled estimate. Here's a cute calculator - maybe this will help? home.ubalt.edu/ntsbarsh/business-stat/otherapplets/Pooled.htm